a now obsolete adjective popular as a business buzzword among yuppies in the early eighties. It described a worker who was very smart and very fast-paced.

This meaning of "crack" was forced out by the drug, crack, in the mid-eighties. Sort of like you can't say "gay" to mean "happy" anymore.
That was a good move to hire him; he's crack.
by Dr. Heywood R. Floyd May 20, 2007
Get the crack mug.
Removing copyright protection from copyrighted software. Commonly used to obtain software without paying for it. Cracking is not by inserting a false or used serial number, but to insert other documents and files into the actual program to make it seem like it was registered by a paying customer, when it actually wasn't.
My friend downloaded Microsoft Word, and is cracking it right now.
by Umbepo July 17, 2005
Get the cracking mug.
Another form of cocaine: 2 parts cocaine to one part baking soda, with a little water, heat gently until a precipitate forms: this is your crack
Why do cokeheads think they're better than crackheads?
by urchin May 14, 2003
Get the crack mug.
I cracked on the shawty Melissa earlier
I'm trying to crack on that one girl right there
by DaWvyBoy November 7, 2019
Get the Crack mug.
The word originates from the Anglo-Saxon term, "crack" meaning fun.

It possibly dates back as far as Old English or the older Scots dialect and is still used today by Ulster-Scots in Northern Ireland.

Borrowed by the Gaelic Irish and spelt "craic", the term has been picked up by UK journalists in recent years and has re-entered the use of the word (Hiberno-English) in mainland UK.

Dublin journalists in the 1970s frequently spelt the word as "crack" in written articles.
What's the crack?
Aye it was good crack!
To crack a joke
by GoonerGary May 12, 2007
Get the crack mug.
1. freebase form of cocaine, generally smoked in a crackpipe

2. the crevice between one's butt cheeks.
"The Customs officer stripsearched Oprah and found forty pounds of crack."
by Joe Bone March 14, 2005
Get the crack mug.
A small, illegal program who's sole purpose is to trick another program (by editting, imputting a registration key, or some other method) into thinking it has been registered.
by Invalid H. User April 24, 2003
Get the crack mug.